SingleChildScrollView 单子滑动

使一个组件具有滑动的效果，可指定滑动的方向、是否反向、滑动控制器等属性。

SingleChildScrollView基本使用

【child】 : 子组件 【Widget】
【padding】 : 点击事件 【EdgeInsetsGeometry】

import 'package:flutter/material.dart';
class CustomSingleChildScrollView extends StatelessWidget {
  final data = <Color>[
    Colors.blue[50],
    Colors.blue[100],
    Colors.blue[200],
    Colors.blue[300],
    Colors.blue[400],
    Colors.blue[500],
    Colors.blue[600],
    Colors.blue[700],
    Colors.blue[800],
    Colors.blue[900],
  ];
  @override
  Widget build(BuildContext context) {
    return Container(
      height: 200,
      child: SingleChildScrollView(
        padding: EdgeInsets.symmetric(horizontal: 10),
        child: Column(
          children: data
              .map((color) => Container(
            alignment: Alignment.center,
            height: 50,
            color: color,
            child: Text(
              colorString(color),
              style: TextStyle(color: Colors.white, shadows: [
                Shadow(
                    color: Colors.black,
                    offset: Offset(.5, .5),
                    blurRadius: 2)
              ]),
            ),
          ))
              .toList(),
        ),
      ),
    );
  }
  String colorString(Color color) =>
      "#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
}

SingleChildScrollView滑动方向

【scrollDirection】 : 滑动方向 【Axis】
【reverse】 : 是否反向 【Axis】

import 'package:flutter/material.dart';
class DirectionSingleChildScrollView extends StatelessWidget {
  final data = <Color>[
    Colors.blue[50],
    Colors.blue[100],
    Colors.blue[200],
    Colors.blue[300],
    Colors.blue[400],
    Colors.blue[500],
    Colors.blue[600],
    Colors.blue[700],
    Colors.blue[800],
    Colors.blue[900],
  ];

  @override
  Widget build(BuildContext context) {
    return Container(
      height: 200,
      child: SingleChildScrollView(
        scrollDirection: Axis.horizontal,
        reverse: true,
        padding: EdgeInsets.symmetric(horizontal: 10),
        child: Row(
          children: data
              .map((color) => Container(
            alignment: Alignment.center,
            width: 90,
            color: color,
            child: Text(
              colorString(color),
              style: TextStyle(color: Colors.white, shadows: [
                Shadow(
                    color: Colors.black,
                    offset: Offset(.5, .5),
                    blurRadius: 2)
              ]),
            ),
          ))
              .toList(),
        ),

      ),
    );
  }
  String colorString(Color color) =>
      "#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
}